diff --git a/hw/audio/ac97.c b/hw/audio/ac97.c
index cbd959e..efa20b5 100644
--- a/hw/audio/ac97.c
+++ b/hw/audio/ac97.c
@@ -1387,6 +1387,23 @@ static void ac97_realize(PCIDevice *dev, Error
**errp)
     ac97_on_reset (&s->dev.qdev);
 }

+static void ac97_exit(PCIDevice *dev)
+{
+    AC97LinkState *s = DO_UPCAST(AC97LinkState, dev, dev);
+
+    if (s->voice_pi) {
+        AUD_close_in (&s->card, s->voice_pi);
+    }
+    if (s->voice_po) {
+        AUD_close_out (&s->card, s->voice_po);
+    }
+    if (s->voice_mc) {
+        AUD_close_in (&s->card, s->voice_mc);
+    }
+


You don't need to check if the pointer is non-null, same for es1370

Regarding style (space before parentheses), I think it's best to use qemu